Main Features 61 Velocity-Sensitive Keys 4 Velocity Curves and 3 Fixed Velocities 8 Velocity-Sensitive Trigger Pads 8 Control Pots and 9 Faders Modulation and Pitch Bend Wheels Transpose and Octave-Shift Buttons Full Transport Controls Bitwig 8-Track Included Compatibility with Apple iOS Intelligent Mapping for Major DAWs Specifications Keyboard: 61 Keys, Synth Action with Velocity. MIDI Control Surfaces: 8 x Pad (Velocity-Sensitive), 8 x Rotary Encoder, 9 x Slider, 9 x Button (Assignable). Performance Functions: Transport Controls. Connectivity: 1 x USB Type-B, 1 x 1/4″ TS Footswitch Input. OS Compatibility: macOS 10.7 or Later, Windows Vista, Windows 7 or Later, Linux. *As of November, 2018: Check with manufacturer for the most up-to-date compatibility Power Options: USB Bus Power. USB Power Requirement: 500 mA (100 mA in low power mode).